Download MendeleyStructure of a Thermobifida fusca lytic polysaccharide monooxygenase and mutagenesis of key residues.
Kruer-Zerhusen, N., Alahuhta, M., Lunin, V.V., Himmel, M.E., Bomble, Y.J., Wilson, D.B.(2017) Biotechnol Biofuels 10: 243-243
- PubMed: 29213309
- DOI: https://doi.org/10.1186/s13068-017-0925-7
- Primary Citation of Related Structures:
5UIZ - PubMed Abstract:
Auxiliary activity (AA) enzymes are produced by numerous bacterial and fungal species to assist in the degradation of biomass. These enzymes are abundant but have yet to be fully characterized. Here, we report the X-ray structure of Thermobifida fusca AA10A (TfAA10A), investigate mutational characterization of key surface residues near its active site, and explore the importance of the various domains of Thermobifida fusca AA10B (TfAA10B). The structure of TfAA10A is similar to other bacterial LPMOs (lytic polysaccharide monooxygenases), including signs of photo-reduction and a distorted active site, with mixed features showing both type I and II copper coordination. The point mutation experiments of TfAA10A show that Trp82 and Asn83 are needed for binding, but only Trp82 affects activity. The TfAA10B domain truncation mutants reveal that CBM2 is crucial for the binding of substrate, but that the X1 module does not affect binding or activity.
Organizational Affiliation:
Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY USA.
